You return to the platform tab and prices, the chart or the position list are showing values from minutes ago before they suddenly jump.
The browser suspended or throttled the background tab to save power, so the platform stopped receiving updates.
Modern browsers actively slow down or freeze tabs that are not visible, and operating systems suspend applications on sleep. The platform is a web page, so when it is frozen it simply stops receiving updates. On resuming it reconnects and catches up, which is why prices jump. The danger is the gap in between, when the screen shows a price that no longer exists.
Leave the tab in the background for a few minutes, come back, and confirm the price starts ticking within a second or two rather than sitting still and then jumping.
Give the platform its own always-visible window, keep the machine awake while positions are open, and never place an order from a price that has not ticked since you returned.
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