1.9.8: Some menu items take a long time to open

[maa2]

XnView: MP 1.9.8 - 64 bit
OS: Windows 7 SP1 64bit

<Short description of the problem.>
When you open these menu items for the first time after launch
"Tools - Settings" or "Help - About"
this takes several seconds and there is a high CPU core load.
(In XnView Classic these menu items open without delay)

[xnview]

Strange, no delay here. You can reproduce?