Although I'm not sure I totally understand your current permit status, personally, I would not risk traveling at this point. My understanding is that if you are under 'maintained status' and you leave the country, or under a special/temporary extension while waiting for your application to be processed, you may be able to re-enter but you might not be able to work. I have not left Canada for the past 3.5 years because I have been on 'maintained' status waiting on an a very standard Study Permit extension application. There were no issues, no requests for documents, no complicated past, and I've been in Canada since before I turned 18. I followed up regularly, sent registered letters (because I knew it was at the Edmonton office -- no reply ever received) & asked for help from MP, but only yesterday did I get my proper Study-Ext Permit (w. open work permit) approved and there was no explanation as to why it took so long. Covid would explain some delay but not all of it. Now just waiting for TR2PR but I feel better that I'm not still on 'maintained' status.