Locking up when suggestion list is emptied

[BlakeTheAwesome]

This bug report was generated using the Issue reporter in VSCode after completing an extension bisect.

Issue Type: Bug

I am working on a TypeScript file, and was trying to write the variable name 'topic' but VS Code was locking up every time I would hit 'p'.
'Extension bisect' showed Clipboard Manager was the cause.

When typing 't' my suggestion list was:

• throw
• trycatch
• extra thing added by clipboard manager

When typing 'to' my suggestion list was:

• throw
• extra thing added by clipboard manager

When typing 'top' the UI would become unresponsive and had to be manually closed.

Extension version: 1.4.2
VS Code version: Code 1.61.2 (6cba118ac49a1b88332f312a8f67186f7f3c1643, 2021-10-19T15:49:28.381Z)
OS version: Darwin x64 20.6.0
Restricted Mode: No

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-8850H CPU @ 2.60GHz (12 x 2600)
GPU Status	2d_canvas: enabled gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled webgl: enabled webgl2: enabled
Load (avg)	5, 13, 13
Memory (System)	32.00GB (13.98GB free)
Process Argv	cbw-ui-app --crash-reporter-id 3b2f3a40-8a3d-4700-986c-d58c915a8f5c
Screen Reader	no
VM	0%

A/B Experiments

vsliv368cf:30146710
vsreu685:30147344
python383:30185418
vspor879:30202332
vspor708:30202333
vspor363:30204092
pythontb:30283811
pythonptprofiler:30281270
vshan820:30294714
vstes263:30335439
vscorecescf:30384386
pythondataviewer:30285071
pythonvsuse255:30340121
vscod805:30301674
pythonvspyt200:30340761
binariesv615:30325510
vsccppwtct:30382698
bridge0708:30335490
pygetstartedt3:30385195
dockerwalkthru:30377721
bridge0723:30353136
pythonrunftest32:30373476
pythonf5test824:30373475
javagetstartedt:30391933
pythonvspyt187:30373474
vsqsis200:30386379
vsaa593:30376534
vssld246:30386377