Big print issues with Neptune 4 max

Trying to print a large object that covers almost the whole bed. It has a lot of support trees. As you can see the printer is trying to print the brims for the trees.But the issues start in the first layer of the print.

I'm trying to print with transparent filaments. As you can see some parts of the first layer is perfectly printed and looks completely transparent (Hard to see). But some other parts look whitish and gets of the bed after a few moments. Then if the nozzle tries to pass over it, the white parts completely come off the bed and ruins the whole print. The print lines are perfect around the center and the backside of the bed but completely ruined in the front side. I believe it might be a bed uneven heating issue as I can easily touch the front side of the bed even when it should be 70°C hot.

Tried Transparent PLA+ first, thought it's a filament issue. Then switched to Transparent PETG. I tried to print this with each of the filaments 3-4 times with slightly different temperature and settings. But couldn't make it work. I don't think its a filament temperature issue. The filaments are completely fresh out of the box. So no humidity issues.

In the last image you can see a perfect print with the filament and same settings. It prints perfectly if the object is small and in the center of the printer. I saw a youtube video explaining bed bending while heating unevenly. Is this the issue?