Weird Problem

I evac’ed and recharged the AC, and now when the key is turned on all of the dash gauges sweep across until they’re pegged wide open.
The only thing I did was add freon and turn the AC on.
I recently had the whole instrument cluster out to clean it up and replace bulbs, re-installed it and everything worked perfect for the last month. Has anyone else had this issue?
I’ll include pics of the modded instrument voltage regulator.
Thanks in advance to all you guys for being so helpful.