After last Update. Avast declares old PDFs as PhishingX

Hello everyone,

Since the last update, Avast has been moving old emails with PDF attachments to quarantine.
The files were generated by my CRM (vTiger). Until now, I never had any problems.
It started with blocking the download of the PDF because the CRM runs on a NAS without SSL. After I created an exception for the NAS, the download worked.
However, the PDFs were all declared as PhishingX and moved to quarantine. I have since resolved this issue. Avast was disturbed by a page break in the document.
I deleted the page break. But now Avast is going through my old emails in Outlook (which I sent myself) and deleting them. What kind of nonsense is this?

Does anyone have an idea how I can stop this, apart from changing the antivirus software?

Regards

Avast will block PDF files if they contain a clickable URL that is on avast blacklist