Planet colonizing bug

Hello,

 

I encountered a wierd thing in my last game where I tried to colonize enemy planet and it kept refreshing as enemy colonized world over and over after each destruction and colonization attempt I made.

 

Few notes:

• 6 player map, only me and one last AI alive
• the said system is appearing uncolonized but there's orange AI structures around it (i thought it was an intel bug at first, where one AI took another AI system without me recently exploring)
• once the orange AI structures are destroyed and planet colonized via colony ship it refreshed itself as green AI colonized planet (the said AI is already defeated)
• when destroying the planet and attempted to colonize again the whole thing just repeats (tried more than 4 times even before reloading and recording the video)
• I went on to just end the last AI and this weird thing kept happening for another planets in this specific state (unexplored, apparently uncolonized world with different AI structures in the system)

I'm attaching a youtube video I uploaded and also savefile. I'm not playing on test version.