Can I travel abroad while on an education visa in Thailand and return without issues?

Hi there, me again. I heard about ppl getting the vaccine outside of Thailand and then coming right back and i thinking about doing something similar. I'm on an ed-visa, first extension of stay (until dec21) and the university will be closed from mid may until August (summer break) and i assume that after that they'll continue classes online (i honestly don't think the situation will be much better then than it is now but feel free to share your opinion on this). So the idea is to go to Germany and stay for maybe half a year. Now my question is will i have to get a new visa (and after three months apply for a new extension of stay) or can i get a reentry permit (assuming that i reenter before the end of my current extension of stay)? Will Immigration get suspicious when see that i came on ed visa for 9 months, leave for half a year and come back on ed visa again? I know that it's hard to say because it's always up to the officer and the case but maybe someone has been in a similar situation and has some insight. Also I'll go to immigration mid month for my 90day report and will take the occasion to ask immigration as well. Thanks for any input!