Repro steps:
1. Open attached project
2. Build and run on Android
3. Press the button on the screen which schedules and sends a 1000 notifications and immediately cancels them

Actual: App crashes

Reproducible with: Mobile Notifications package version 1.0.3 - preview.3

Tested and reproduced on these devices:
VLNQA00038, Htc Desire 510 (HTC Desire 510), Android 4.4.3, CPU: Snapdragon 410 MSM8916, GPU: Adreno (TM) 306
VLNQA00146, Htc 10 (HTC 10), Android 7.0, CPU: Snapdragon 820 MSM8996, GPU: Adreno (TM) 530
VLNQA00112, Htc M9 (HTC One M9), Android 7.0, CPU: Snapdragon 810 MSM8994, GPU: Adreno (TM) 430
VLNQA00052, Xiaomi MI MAX (MI MAX), Android 7.0, CPU: Snapdragon 617 MSM8952, GPU: Adreno (TM) 510
VLNQA00139, Vivo Xplay6 (vivo Xplay6), Android 7.1.1, CPU: Snapdragon 820 MSM8996, GPU: Adreno (TM) 530
VLNQA00155, Meizu PRO 7 Plus (PRO 7 Plus), Android 7.0, CPU: MediaTek Helio X30 MT6799, GPU: PowerVR Rogue GT7400 Plus

Didn't reproduce on:
VLNQA00166, Huawei P20 (EML-L29), Android 8.1.0, CPU: HiSilicon Kirin 970, GPU: Mali-G72
VLNQA00231, Huawei HUAWEI Mate 20 Pro (LYA-L29), Android 9, CPU: HiSilicon Kirin 980, GPU: Mali-G76
VLNQA00009, Samsung Galaxy Note8 (SM-N950F), Android 9, CPU: Exynos 9 Octa 8895, GPU: Mali-G71