[BUG] CancellableNetworkTileProvider closes externally created clients #2020
Description
What is the bug?
Follows up on #2009 and #2009 (comment).
How can we reproduce it?
Do you have a potential solution?
I opened a PR with a similar fix as in #2012.
Platforms
Severity
Erroneous: Prevents normal functioning and causes errors in the console