Custom Table widget with View Limitation not loading

Depends on the definition of the Custom Table.  If the table is SWQL, then it's reporting as it should (based on the account or page limitations).  Any chance you can share the code behind the table or provide a screenshot and details on the limitation?

select n.DisplayName as Name, n.DetailsUrl as _LinkFor_Name, a.CurrentValue as Vin, output.CurrentValue as Vout, current.CurrentValue as Amps, temp.CurrentValue as Temp
from orion.npm.CustomPollerAssignment a
join orion.npm.CustomPollers b on a.CustomPollerID=b.CustomPollerID
join orion.Nodes n on a.NodeID=n.NodeID

join (select a.CurrentValue, a.NodeID as node
from orion.npm.CustomPollerAssignment a
join orion.npm.CustomPollers b on a.CustomPollerID=b.CustomPollerID
join orion.Nodes n on a.NodeID=n.NodeID
where b.UniqueName = 'BMMoutputVoltage') as output on a.NodeID = output.node

join (select a.CurrentValue, a.NodeID as node
from orion.npm.CustomPollerAssignment a
join orion.npm.CustomPollers b on a.CustomPollerID=b.CustomPollerID
join orion.Nodes n on a.NodeID=n.NodeID
where b.UniqueName = 'BMMoutputCurrent') as current on a.NodeID = current.node

join (select a.CurrentValue, a.NodeID as node
from orion.npm.CustomPollerAssignment a
join orion.npm.CustomPollers b on a.CustomPollerID=b.CustomPollerID
join orion.Nodes n on a.NodeID=n.NodeID
where b.UniqueName = 'BMMbatteryTempF') as temp on a.NodeID = temp.node

where b.UniqueName = 'BMMinputVoltage'
order by n.DisplayName

select n.DisplayName as Name, n.DetailsUrl as _LinkFor_Name, a.CurrentValue as Vin, output.CurrentValue as Vout, current.CurrentValue as Amps, temp.CurrentValue as Temp
from orion.npm.CustomPollerAssignment a
join orion.npm.CustomPollers b on a.CustomPollerID=b.CustomPollerID
join orion.Nodes n on a.NodeID=n.NodeID

join (select a.CurrentValue, a.NodeID as node
from orion.npm.CustomPollerAssignment a
join orion.npm.CustomPollers b on a.CustomPollerID=b.CustomPollerID
join orion.Nodes n on a.NodeID=n.NodeID
where b.UniqueName = 'BMMoutputVoltage') as output on a.NodeID = output.node

join (select a.CurrentValue, a.NodeID as node
from orion.npm.CustomPollerAssignment a
join orion.npm.CustomPollers b on a.CustomPollerID=b.CustomPollerID
join orion.Nodes n on a.NodeID=n.NodeID
where b.UniqueName = 'BMMoutputCurrent') as current on a.NodeID = current.node

join (select a.CurrentValue, a.NodeID as node
from orion.npm.CustomPollerAssignment a
join orion.npm.CustomPollers b on a.CustomPollerID=b.CustomPollerID
join orion.Nodes n on a.NodeID=n.NodeID
where b.UniqueName = 'BMMbatteryTempF') as temp on a.NodeID = temp.node

where b.UniqueName = 'BMMinputVoltage'
order by n.DisplayName

Huh - it should be fine (the SWQL is valid).  What are the defined view limitations?

I just have the view limitation set to a Single Group. Yes, I have verified that a node with the defined pollers is included in the group. I also believe that this was once working at one time. I can't verify it, but it may have quit working when I upgraded to 2020.2.6.

I'd open a support case.  This has the feel of a bug, but I cannot be 100% sure without having more access to your system.