Text: simple causing Shotcut to crash

What is your operating system?
Windows 10 64 bit

What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?
21.05.01

Can you repeat the problem? If so, what are the steps?
I have reproduced this problem in a simple video.
Use ‘open other’ to create a colour entry on the timeline
Add the text: simple filter with no changes. This works okay.
Use the keyframes to alter the start and end point of the text: simple filter. This works okay.
Use the keyframes to add a fade into the text. This crashes Shotcut with no error message.
Re-starting Shotcut and running the video again will cause it to crash every time.
I can’t use text: rich as I want an outline on the text.
Thank you for your assistance.

I am fairly certain this is the same as

A new version is coming very soon.