Regex value missing in transformation view

[andrazrepar]

With large dictionaries, such as https://app.elexifier.elex.is/dictionaries/xml/760/transformations/662/, the regex value dissapears from the interface, but it is still present in the call. See image:

What happened here was:

• I added the regex expression and pressed Update which resulted in the first two calls (662).
• After a few seconds the 760 calls dropped which resulted in the regex area being minimized again.
• When I opened the regex area again, the expression was gone, but when I clicked Update again, the regex was still present in the transformation as you can see on the image above

[gradisarjoze]

I am unable to reproduce this. Please set up a transformation where I can reproduce this.