Polaris booster pump

So this is a new issue. It was working properly before this?
Has the plumbing been altered?
The booster pump draws water from the return (line going to the pool) and then pushes it through a dedicated line to the pool where the cleaner hose is connected.
Maybe show a picture of the set up.
 
It appears the suction and return lines on the booster pump are reversed?
The top of the pump is the return line and it should go to the dedicated line to the pool. That is the line that appears to be between the 2 red handles. It seems to go straight down in the ground.

The suction to the pump should come from the return line going to the pool. . The return line to the pool is where that goes to that reducing adapter and appears to Tee into the pool return line. The photo of that where that connection is would be helpful.
 

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Last year everything worked fine there was no changes to anything since then. Opened pool now water jet (for vacuum) pushes water out just fine till I turn the booster pump on. Then the line flow reverses and pulls water.
 
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