GS105Ev2 does not get IP address from DHCP

I, too, find it difficult believe that it behaves that way.  But, that does not change the fact that it does!  I would love for some others to confirm with comments to this post if they have seen the same thing:  after getting the initial IP via DHCP, the GS105Ev2 will not get a new IP via DHCP without a factory reset.

For several reasons, I don't think the router was reassigning the "old, initial" IP address instead of the "new, allocated" IP each time based on the MAC.

• I have many devices with allocated IPs in DHCP, and they have all worked flawlessly except for this GS105Ev2.  I suppose it could be a problem for certain kinds of devices that periodically change the MAC for security purposes, but this NETGEAR switch does not do that.
• Without touching the configuration on the router, holding the factory reset button on the GS105Ev2 did cause it to get the correct IP via DHCP when it booted back up.  How would router even know the factory reset occurred, as opposed to a software reset or power cycle?  All the router knows is that the device is using DHCP to request an IP address.

I don't see how I could have "accidentally" set it to use a static IP via the HTTP interface, unless that interface has underlying bugs.  It's pretty simple:

• Select via a "DHCP Mode" drop down either "Enable" or "Disable"
• If DHCP Mode "Disable" is selected, a fixed IP address is used and you can manually enter "IP Address", "Subnet Mask" and "Gateway Address".
• If DHCP Mode "Enable" is selected, the "IP Address", "Subnet Mask" and "Gateway Address" are disabled.
• There is a "Refresh" checkbox, which I assume means update the IP when the Apply button is pressed (but could not find a description of what it actually does).  I tried it checked and uncheck -- it did not make a difference immediately or after software Device Reboot or power cycle.