I’m sorry if I’m reading this wrong. Are you saying that you’re on the AWS t2.micro instance size? The instance size with 1GB of RAM and 1 vCPU? You’re probably hitting CPU constraints, if not RAM constraints due to your plugin load.
From the AWS docs:
T2 instances are Burstable Performance Instances that provide a baseline level of CPU performance with the ability to burst above the baseline. The baseline performance and ability to burst are governed by CPU Credits. Each T2 instance receives CPU Credits continuously at a set rate depending on the instance size.
With a Micro instance, you’re getting 6 CPU credits/hour, and that’s not great. You’d probably be better off migrating to the Digital Ocean equivalent tier, which is $10/mo, or even the DO $20/mo tier that offers double the RAM.