Are you aware that you could have applied for this:
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/guide-5529-applying-permanent-resident-travel-document.html#step1
Important information: If you are living outside Canada on a long-term basis, you can request a long-term multiple entry PRTD. Usually, PRTD counterfoils are issued for a single entry to Canada. However, you can request a long-term multiple entry PRTD if you:
- meet the residency obligation; and
- are living outside Canada on a long-term basis (for example, if you are a permanent resident accompanying your Canadian citizen spouse).
Include a cover letter that explains your circumstances and request a multiple entry PRTD.
Multiple entry PRTDs cannot extend beyond the expiry date of your passport.
---
Unless you plan to relocate back to Canada, you might consider this option. Maybe send a web form to IRCC asking if you can modify your PRTD application. It doesn't solve your current [potential] problem, but could make life easier for future trips to Canada.
Good luck!