I installed both Apps and tried to reproduce (I’m on 2.6.3-t on a FP3 … I’d guess you’re too on A13 / T ? though)
It’s inconclusive. I can’t bring dict.cc to crash - for me it works™.
Spiegel App has the infinite-loading symbol on at all times. In the logcat it doesn’t say much beside
D MainContentActivity: comparing https://www.spiegel.de/ with https://www.spiegel.de/schlagzeilen/
D MainContentActivity: url mismatch; discarding fragment action
I had Advanced Privacy tracker blocking deactivated.
If you want/can, here is how you can do on-device logcat watching: [HOWTO] log app errors with LogFox on-device to create bugreports - I guess if the fault is with /e/OS it must be up to the webview