Description:
Libreoffice takes ~ 45 seconds to start on my decent arch linux computer (NVME, 6-core i5, 16GB). The behavior most likely started a few weeks ago. The progress bar is pausing quite some time on ~1/3 and again on 1/2.

I tried the following versions:
- libreoffice-still (7.4.7-2) from arch repos
- libreoffice-fresh (7.5.3-2) from arch repos
- org.libreoffice.LibreOffice (7.5.3.2) from flatpack



Steps to Reproduce:
1. Start libreoffice (via menu or terminal)

Actual Results:
~45 seconds start time

Expected Results:
~3 seconds start time


Reproducible: Always


User Profile Reset: Yes

Additional Info:
Version information from LO about dialog (flatpack version):
Version: 7.5.3.2 (X86_64) / LibreOffice Community
Build ID: 50(Build:2)
CPU threads: 6; OS: Linux 6.3; UI render: default; VCL: gtk3
Locale: de-DE (de_DE.UTF-8); UI: de-DE
7.5.3-2
Calc: threaded

I tried the following – without success:
- Start in safe mode (no difference)
- Remove .config/libreoffice
- Cleared, last used in LO as well as in desktop
- Disable CUPS
- Started with and without sandboxing
- Change java version as well as disabling java

strace shows that the long start is (mainly?) due to two reads which time-out. The terminal output shows a few errors, but I think those happened before:
```
(soffice:121124): GLib-GObject-CRITICAL **: 22:14:05.798: invalid (NULL) pointer instance

(soffice:121124): GLib-GObject-CRITICAL **: 22:14:05.798: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(soffice:121124): GLib-GObject-CRITICAL **: 22:14:30.929: invalid (NULL) pointer instance

(soffice:121124): GLib-GObject-CRITICAL **: 22:14:30.929: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
```

OS: Arch Linux, 64bits, X11, Mate