WIFI Suddently disabled after reboot topic

Hi all,

I hope I can get some help here.
Yesterday I rebooted my S4 Active after I installed some app updates, and suddenly WIFI can't be enabled anymore.

First I thought the phone might be broken, but I tested a factory reset and WIFI works again.
But I don't want to reinstall all apps and lose app settings and so on. I also want to know what is causing this issue, it might happen again.

I am on official Stock Rom (Android 4.4.2) I9295XXUCNE5 I9295PHNCNE1. I am using this rom without any problems since a half year.
So I did some testing with adb and usb debugging, and for some reason the wifi kernel driver cannot be loaded. I tried loading it manually with:

Code:

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insmod /system/lib/modules/dhd.ko

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But this fails with:

Code:

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insmod /system/lib/modules/dhd.ko
insmod: init_module '/system/lib/modules/dhd.ko' failed (Exec format error)

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I looked into output of kmesg, and it shows this when trying to load the wifi module:

Code:

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<3>[  614.365997] QSEECOM: qsee_disable_clock_vote: Client error.Extra call to disable SFPB clk
<3>[  614.362304] QSEECOM: qseecom_ioctl: Failed to vote for SFPB clock-6
<3>[  614.362060] QSEECOM: qsee_vote_for_clock: SFPB Bandwidth req failed (-6)
<3>[  614.361816] AXI: msm_bus_scale_client_update_request(): Client 3720895680 passed invalid index: 3

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Again when I do a factory reset, WIFI works fine again, so it has to be a software bug somewhere.