Reproduction steps:
1. Open attached project "1369770_SphereCast"
2. Open Scenes/Empty
3. Open Scripts/TestCapsuleSphereCast/CapsuleSpawnSystem and uncomment line 22 and comment-out line 23
4. Save the Script and enter Play Mode

Expected result: ColliderCastHit.Position is the position of the hit
Actual result: ColliderCastHit.Position is NaN

Reproducible with: 0.6.0-preview.3 (2020.3.20f1, 2021.1.26f1, 2021.2.0b15, 2022.1.0a13)
Could not test with: 0.4.1-preview (2019.4.32f1, Compiler error: The type or namespace name 'Entities' does not exist in the namespace 'Unity'), 0.5.1-preview.2 (2020.3.20f1, 2021.1.26f1, 2021.2.0b15, 2022.1.0a13, Compiler Error: 'CollisionWorld' does not contain a definition for 'SphereCastCustom' and no accessible extension method 'SphereCastCustom' accepting a first argument of type 'CollisionWorld' could be found)

Notes:
- ColliderCastHit Fraction and SurfaceNormal is also NaN
- Position checking is in Scripts/TestCapsuleSphereCast/SphereCastSystem in line 91
- If you are getting "An error occurred while resolving packages:" errors, remove "com.madsbangh.easybuttons" package in the Package Manager