md5 
6e0191139c389fa8ac96fc866837cdc0  *dd-wrt-webupgrade.bin
0dbd80ab96aeed1ab5994d635e9e8645  *wndr3700v4-webflash.bin
4e1cbceacd3b8e1a5d25f23ce877bdff  *wrt160nl-firmware.bin

sha256 
c0c7dae5f772058f4ef66b46971dc55263002b443b6362f2c6b0c14137d88d9d  *dd-wrt-webupgrade.bin
80cbe8e03f4553ea42ea09cd8d9e78d7c9547edb10b963e2a4186b674a5e935e  *wndr3700v4-webflash.bin
f7e1593db03f784deb03cb68025552492f9ff705741c44ea168c9482da21b7c0  *wrt160nl-firmware.bin

#

Linksys0 EA8500
DD-WRT v3.0-r40386 std (07/19/19)
Linux 4.9.185 #333 SMP Wed Jul 10 12:44:18 CEST 2019 armv7l

all good on the EA8500 that is just a switch / ovpn server / samba share
its ovpn server works good also caused I checked.

I thought I would try it on the main router.
BAD BAD SHIT for main router EA8500 !!!
GUI install over r40370 (which was working perfectly fine).
Webif never came back and couldn't reach anything.....course I use local DNS and installed via connect by router name.
I tried access by IP and then got to its webif. WAN showed correct, wireless was showing connected to devices. 
Static leases were showing correct and connected.
Local DNS was NO good and could NOT connect to anything past WAN (internet).
I disabled unbound but that didn't help anything. Its ovpn sever showed nothing (NOT working...which it should come up with WAN-up.)
I did manual power cycle but still excact same results'
I didn't get any logs and just had to swap in the spare main router. 
I'll look into it more in morning..... since it is after 2:00 AM here now.
Also NOTHING from outside could reach devices within my network.....I tried from cell network with the phone.
Only thing I didn't try. I have JFFS2 enabled.....I should have disabled and rebooted to see if that might have helped.
I just can't be down long like that. I see from the Apache server lots of folks banging the webserver after I got spare router in.

#

Netgear WNDR3700 V4
DD-WRT v3.0-r40386 std (07/19/19)
Linux 3.18.140 #47502 Fri Jul 19 04:14:15 CEST 2019 mips
switch / samba share / ovpn server 
all good

#

Linksys WRT160NL
DD-WRT v3.0-r40386 std (07/19/19)
Linux 3.10.108-d8 #15570 Fri Jul 19 02:27:37 CEST 2019 mips

all good here but it's only a switch / samba share
GUI install and all came back up just like it should.
Did NOT have to do a power cycle like most previous builds.