[RESOLVED] Wireless 5G frequency suddenly disabled

[BonBonCat]

I'm new to linux and been using kubuntu for a while now. There's a problem with my wireless connection specially 5G connection. I used to be able to connect to my wireless 5G connection, but today i can't connect to it. when i check iw list i found this

Frequencies:
* 5180.0 MHz [36] (disabled)
* 5200.0 MHz [40] (disabled)
* 5220.0 MHz [44] (disabled)
* 5240.0 MHz [48] (disabled)
* 5260.0 MHz [52] (disabled)
* 5280.0 MHz [56] (disabled)
* 5300.0 MHz [60] (disabled)

with iwlist wireless_interface frequency i got this

wlp7s0 17 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Channel 149 : 5.745 GHz
Channel 153 : 5.765 GHz
Channel 157 : 5.785 GHz
Channel 161 : 5.805 GHz
Current Frequency:2.437 GHz (Channel 6)

my current 5G connection use channel 36 and used to be fine and able to connect. but today i can't connect to my 5G anymore

is there a way to enable those disabled frequency?

[BonBonCat]

Tried to restore my system backup but still some channel is missing. After couple of restart suddenly it's fixed. Probably it's hardware problem. How to delete this post? It's already solved now