VCF sent from iPhone causes Signal to hang

[x] I have searched open and closed issues for duplicates
[x] I am submitting a bug report for existing functionality that does not work as intended
[x] I have read https://github.com/signalapp/Signal-Android/wiki/Submitting-useful-bug-reports
[x] This isn't a feature request or a discussion topic

Bug description

I was sent someone's contact info as a VCF/vCard file from an iPhone. When I opened my messages with that user, the app became unresponsive and had to be forcibly restarted. I had the person who sent me the VCF file send me several more regular messages, in the hopes that clearing the VCF data from the screen would work around the problem, but it didn't help. Any attempt to look at the messages from that person now causes Signal to hang.

In searching the bug database, I found several issues over the years about VCF not being supported, or causing app crashes. The issues causing crashes have been closed for years, and this is not a request to add support for VCF files.

Steps to reproduce

Have an iPhone user send contact info via SMS to a Signal user on Android.
The recipient opens Signal, and taps on the sender's name.
The app hangs - the cursor in the text entry field at the bottom does not blink. Pressing the virtual "back" button eventually leads to an Android dialog saying that the app is unresponsive, and asking if I want to wait/quit/send info.

Actual result: The app hangs. Expected result: The app displays (possibly unformatted) VCF data.

Device info

Device: Google Pixel 3XL Android version: 10, security patch level February 5, 2020 Signal version: 4.56.4

Link to debug log

https://debuglogs.org/d23ee7eac0412544a1656d8f9a1e149e7f3f9ec66b941f8f51e44457735ba686

This log was taken right after experiencing a hang (at 12:31p 2020-03-06). The message that caused the hang was sent around 10:40p 2020-03-04.

signalapp / Signal-Android