When I open a specific mail, the Mailspring windows disappears and I get the following in the console window where I started Mailspring:
[1114/151940.453004:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[1114/151940.456373:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[1114/151940.486888:ERROR:directory_reader_posix.cc(42)] opendir /home/tamriel/.config/Mailspring/Crashpad/attachments/6cd3d0a2-d1ae-4fb4-be8d-a3d6ad73f893: No such file or directory (2)
[1114/151940.490469:WARNING:minidump_to_upload_parameters.cc(67)] duplicate annotation name ver, discarding value 1.12.0
[1114/151940.490493:WARNING:minidump_to_upload_parameters.cc(67)] duplicate annotation name platform, discarding value linux
[1] 201046 segmentation fault (core dumped) mailspring --enable-features=UseOzonePlatform --ozone-platform=wayland
[1122/134736.030662:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[1122/134736.032054:ERROR:elf_dynamic_array_reader.h(64)] tag not found
[1122/134736.073414:ERROR:directory_reader_posix.cc(42)] opendir /home/tamriel/.config/Mailspring/Crashpad/attachments/83eaa7a1-9826-48e1-8cdc-e9b24b585bd9: No such file or directory (2)
[1122/134736.082952:WARNING:minidump_to_upload_parameters.cc(67)] duplicate annotation name ver, discarding value 1.13.1
[1122/134736.083005:WARNING:minidump_to_upload_parameters.cc(67)] duplicate annotation name platform, discarding value linux
[1] 372168 segmentation fault (core dumped) mailspring --enable-features=UseOzonePlatform --ozone-platform=wayland
It works flawlessly without usage of wayland. It seems to be an issue with electron and wayland in general, as you can read here: AUR (en) - electron-blur-me-not
So lets wait for electron to fix it…