Tried in 2022.1.0b5 and now got:

Assertion failed on expression: 'gCurrentManagedTempMem != NULL'
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Unity.Collections.NativeArray`1<byte>:Allocate (int,Unity.Collections.Allocator,Unity.Collections.NativeArray`1<byte>&)
Unity.Collections.NativeArray`1<byte>:.ctor (int,Unity.Collections.Allocator,Unity.Collections.NativeArrayOptions)
UnityEngine.InputSystem.InputSystem:QueueStateEvent<MASSIVE.InputSystem.DeviceModules.Shimmer.Shimmer3DeviceState> (UnityEngine.InputSystem.InputDevice,MASSIVE.InputSystem.DeviceModules.Shimmer.Shimmer3DeviceState,double)
MASSIVE.InputSystem.DeviceModules.Shimmer.ShimmerModule:ProcessData (ShimmerAPI.CustomEventArgs) (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Scripts2/ShimmerModule.cs:488)
MASSIVE.InputSystem.DeviceModules.Shimmer.ShimmerModule:HandleShimmerEvent (object,System.EventArgs) (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Scripts2/ShimmerModule.cs:224)
ShimmerAPI.ShimmerBluetooth:OnNewEvent (System.EventArgs) (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Plugins/ShimmerAPI/ShimmerBluetooth.cs:6201)
ShimmerAPI.ShimmerBluetooth:ReadData () (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Plugins/ShimmerAPI/ShimmerBluetooth.cs:1121)
System.Threading.ThreadHelper:ThreadStart ()

and:

ArgumentException: Could not allocate native memory. If this allocation was made from a managed thread outside of a job, you must use Allocator.Persistent or Allocator.TempJob.
Unity.Collections.NativeArray`1[T].Allocate (System.Int32 length, Unity.Collections.Allocator allocator, Unity.Collections.NativeArray`1[T]& array) (at <aba06c866efd427898fe6d5a65b8962a>:0)
Unity.Collections.NativeArray`1[T]..ctor (System.Int32 length, Unity.Collections.Allocator allocator, Unity.Collections.NativeArrayOptions options) (at <aba06c866efd427898fe6d5a65b8962a>:0)
UnityEngine.InputSystem.LowLevel.InputEventBuffer.AllocateEvent (System.Int32 sizeInBytes, System.Int32 capacityIncrementInBytes, Unity.Collections.Allocator allocator) (at Library/PackageCache/com.unity.inputsystem@1.3.0/InputSystem/Events/InputEventBuffer.cs:214)
UnityEngine.InputSystem.LowLevel.InputEventBuffer.AppendEvent (UnityEngine.InputSystem.LowLevel.InputEvent* eventPtr, System.Int32 capacityIncrementInBytes, Unity.Collections.Allocator allocator) (at Library/PackageCache/com.unity.inputsystem@1.3.0/InputSystem/Events/InputEventBuffer.cs:171)
UnityEngine.InputSystem.LowLevel.InputEventStream.Write (UnityEngine.InputSystem.LowLevel.InputEvent* eventPtr) (at Library/PackageCache/com.unity.inputsystem@1.3.0/InputSystem/Events/InputEventStream.cs:99)
UnityEngine.InputSystem.InputManager.QueueEvent (UnityEngine.InputSystem.LowLevel.InputEvent* eventPtr) (at Library/PackageCache/com.unity.inputsystem@1.3.0/InputSystem/InputManager.cs:1739)
UnityEngine.InputSystem.InputManager.QueueEvent[TEvent] (TEvent& inputEvent) (at Library/PackageCache/com.unity.inputsystem@1.3.0/InputSystem/InputManager.cs:1756)
UnityEngine.InputSystem.InputSystem.QueueStateEvent[TState] (UnityEngine.InputSystem.InputDevice device, TState state, System.Double time) (at Library/PackageCache/com.unity.inputsystem@1.3.0/InputSystem/InputSystem.cs:2590)
MASSIVE.InputSystem.DeviceModules.Shimmer.ShimmerModule.ProcessData (ShimmerAPI.CustomEventArgs args) (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Scripts2/ShimmerModule.cs:488)
MASSIVE.InputSystem.DeviceModules.Shimmer.ShimmerModule.HandleShimmerEvent (System.Object sender, System.EventArgs args) (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Scripts2/ShimmerModule.cs:224)
ShimmerAPI.ShimmerBluetooth.OnNewEvent (System.EventArgs e) (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Plugins/ShimmerAPI/ShimmerBluetooth.cs:6201)
ShimmerAPI.ShimmerBluetooth.ReadData () (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Plugins/ShimmerAPI/ShimmerBluetooth.cs:1121)
System.Threading.ThreadHelper.ThreadStart_Context (System.Object state) (at <cdc4992cc04a4e77a24a09cd121af77b>:0)
System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) (at <cdc4992cc04a4e77a24a09cd121af77b>:0)
System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) (at <cdc4992cc04a4e77a24a09cd121af77b>:0)
System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state) (at <cdc4992cc04a4e77a24a09cd121af77b>:0)
System.Threading.ThreadHelper.ThreadStart () (at <cdc4992cc04a4e77a24a09cd121af77b>:0)
UnityEngine.<>c:<RegisterUECatcher>b__0_0(Object, UnhandledExceptionEventArgs)
Unity.Collections.LowLevel.Unsafe.UnsafeUtility:Malloc(Int64, Int32, Allocator)
Unity.Collections.NativeArray`1:Allocate(Int32, Allocator, NativeArray`1&)
Unity.Collections.NativeArray`1:.ctor(Int32, Allocator, NativeArrayOptions)
UnityEngine.InputSystem.InputSystem:QueueStateEvent(InputDevice, Shimmer3DeviceState, Double)
MASSIVE.InputSystem.DeviceModules.Shimmer.ShimmerModule:ProcessData(CustomEventArgs) (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Scripts2/ShimmerModule.cs:488)
MASSIVE.InputSystem.DeviceModules.Shimmer.ShimmerModule:HandleShimmerEvent(Object, EventArgs) (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Scripts2/ShimmerModule.cs:224)
ShimmerAPI.ShimmerBluetooth:OnNewEvent(EventArgs) (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Plugins/ShimmerAPI/ShimmerBluetooth.cs:6201)
ShimmerAPI.ShimmerBluetooth:ReadData() (at Assets/MASSIVE/InputSystem/Devices/Shimmer/Plugins/ShimmerAPI/ShimmerBluetooth.cs:1121)
System.Threading.ThreadHelper:ThreadStart()