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Title: Excel Sheet Name (in Thai font) are super small and hard to read.

Issue:
When naming a sheet name in Thai, the font becomes small and difficult to read. When clicking the sheet name to to edit/rename it comes the correct size. The English font is not effected at all, even when having a combination of English and Thai letters the Thai letter characters become small while the English characters stay a normal size. Shown in picture 1 are the Thai font in a normal cell with the normal font sizing and the sheet names with only English, only Thai, and a combination of both languages and the Thai font is significantly smaller than the English font.  In picture 2 when selecting the sheet name shows the font becomes the normal sizing.
This has occurred in two other computers, making this the third computer to see this problem. This started from the first two computer about two weeks ago and this computer today. 

Picture 1)

Picture 2)

Additional details:
Having scouring the webs and finding similar problems and trying the solutions in those posts with no effect.
1) Changing the system region to Thailand and changing the Language for non-Unicode programs to Thai.
2) Changing the display setting scaling didn't do anything.
3) Updating as well as uninstalling recent update has not done anything.
4) Accessing the registry in reg edit hasn't solved the issue either.
5) Having contacted a live chat in the Microsoft Support and giving them remote access to see if they can solve the problem. They tried a variety of methods and failed and referred me to this community.

Are there any solutions for this or is this a problem on Excel's side and not "fixable" by the user and if so how would one file a ticket to address this problem.