As you can see, it counts minutes to over 60 so I believe this is an issue.
I will also open another issue for my other problem.

It's been a while since I reported this issue, and I observed that on 1.18.2 it simply doesn't reduce the number of the minutes by 60 when increasing the hour by 1. So the easiest fix is to
(pseudocode)

when (hour increases+1)
   {
       minutes-60;
   }

Or the sort I have no clue about the code right now.
In regard of no update so far since April, I will contemplate to attempt to fork and fix this since it's MIT license but hopefully you come back to it before I do and update the 1.18.2 if you happen to have done this for others already (yes/no?).

Please just let me know what to expect so I can work/wait on the better solution for my modpack. It looks quite dorky to have a strange number that doesn't add up on the window bar.

Hey, sorry! Been taking a break from modding due to personal reasons and been logged out of my github account for the past couple of months.
I will create a fix for this once I return after new year. Feel free to fork my projects any time.
Sorry for the trouble this has caused. It is a stupid oversight on my part and should be a simple fix.

Thank you tenfold for the reply. I understand your reasoning and am looking forward to the update then.
Also noted about the fork. Not everybody likes that so I tend to ask for permission before I do anything. 👍

Please do be so kind and notify me once the fix is implemented (especially on 1.18.2) so I can update and test if my modpack still functions properly afterwards :D (It's a lot of mods so things tend to break occasionally)
Take care!