Hi Julia,
I recreated your scenario and I found that if the URL field type is Hyperlink then using the URL in the LinkTo property doesn't work correctly.
The workaround in this situation is to create a calculated field of type "Single line of text" using the formula =[URL] and use this calculated field in the LinkTo property.
In this way you don't change the field type and the change is transparent for the users.
Regarding the initial issue, I logged it in our system and it will be prioritized accordingly.
The reference# is 329347.
Thanks,