AppleScript Disappearing/Simultaneous Numbers corruption?

Hey,

I'm running Catalina 10.15.7, just updated 2-3 days ago.

I have a Numbers error and an AppleScript problem. Now I already fixed the issue, me thinks, but I'm not sure what caused it.

So I have a spreadsheet. I've cleared it of most errors, replaced all lookups with index matches, etc. - I've tried to keep it as clean as I can, with only a dozen instances of volatile functions. Ram use, with just Numbers running stays up 70-80% or more, with 8 gb of RAM. I downloaded a ram manager a while ago to clear it when it gets up there. Because once it gets higher it never comes down. Even when I close everything. And I can't continually restart the computer while I'm working, especially for it to get to the same 70-80% usage as soon as I start working again. It's just gonna beachball, freeze, and then I get to hope that I can force quit it without losing data.

I only use one AppleScript for the spreadsheet, as a shortcut key to input time. I've probably been using it for at least 2-3 years without any problems. I was lazy when I made it, it only responds to input of Table 1 of the open spreadsheet.

Last night, the last time I used the function was 11:25 PM, seemingly after 12 AM it stopped functioning. First, I got an error similar to "The action “Run AppleScript” encountered an error: “Numbers got an error: Can’t set selection range of table 1 of active sheet of document 1 to "Friday, October 9, 2020 at 4:24:44 PM".” Then I got nothing when I pressed the shortcut again. Checked the workflow, it wouldn't work on that specific tab anymore. It did work on other tabs, of which the one I was using was a duplicate, but only when I ran it from automator.

There are a couple problems.

One, I noticed a "wireless signal" sound coming from the computer, not like a modem, but that high pitch dot-dash beeping. I went through unplugging everything around me to find it like a nutcase. Also, the shortcut stopped working, and the script (along with other scripts) was gone from the "Settings/Keyboard" menu. I shutdown the computer and two scripts reappeared, though not the one I was looking for. Then I almost internet reformatted myself, before I finally reset the PRAM, lol. The script came back after the PRAM reset - under the keyboard settings, but without it's shortcut intact.

I retyped a new shortcut key. The script still wouldn't run by shortcut key, or automator on the problem tab. So, I duplicated the tab, tried to run it, with no luck again. On a whim, I changed the applescript to run in Table 2, and it worked on the tab I was having the error message with, and it shouldn't have, because I was still in Table 1, there's only one table. So, I guesstimated somehow Numbers changed the table from Table 1 to Table 2. At that point I copied the problem sheet, and duplicated an older sheet, cleared it, pasted over, and reformatted 250 rows. I rewrote the AppleScript back to the original Table 1, and it's working as normal again.

So, my thing is is any of this indicative of a bigger problem coming? Hardware? Software? Anything else I should check out?