More output from strace -f ...
which seems to generate endlessly in a loop:
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] close(34) = 0
[pid 5284] <... read resumed> "\1\0\0\0\0\0\0\0", 8) = 8
[pid 5284] read(4, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 5284] read(4, <unfinished ...>
[pid 5269] openat(AT_FDCWD, "/dev/random", O_RDONLY|O_NOCTTY|O_NONBLOCK) = 34
[pid 5269] fstat(34, {st_mode=S_IFCHR|0666, st_rdev=makedev(0x1, 0x8), ...}) = 0
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] close(34) = 0
[pid 5269] openat(AT_FDCWD, "/dev/urandom", O_RDONLY|O_NOCTTY|O_NONBLOCK) = 34
[pid 5269] fstat(34, {st_mode=S_IFCHR|0666, st_rdev=makedev(0x1, 0x9), ...}) = 0
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] close(34) = 0
[pid 5284] <... read resumed> "\1\0\0\0\0\0\0\0", 8) = 8
[pid 5284] read(4, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 5284] read(4, <unfinished ...>
[pid 5269] openat(AT_FDCWD, "/dev/random", O_RDONLY|O_NOCTTY|O_NONBLOCK) = 34
[pid 5269] fstat(34, {st_mode=S_IFCHR|0666, st_rdev=makedev(0x1, 0x8), ...}) = 0
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] close(34) = 0
[pid 5269] openat(AT_FDCWD, "/dev/urandom", O_RDONLY|O_NOCTTY|O_NONBLOCK) = 34
[pid 5269] fstat(34, {st_mode=S_IFCHR|0666, st_rdev=makedev(0x1, 0x9), ...}) = 0
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] close(34) = 0
[pid 5284] <... read resumed> "\1\0\0\0\0\0\0\0", 8) = 8
[pid 5284] read(4, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 5284] read(4, <unfinished ...>
[pid 5269] openat(AT_FDCWD, "/dev/random", O_RDONLY|O_NOCTTY|O_NONBLOCK) = 34
[pid 5269] fstat(34, {st_mode=S_IFCHR|0666, st_rdev=makedev(0x1, 0x8), ...}) = 0
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] close(34) = 0
[pid 5269] openat(AT_FDCWD, "/dev/urandom", O_RDONLY|O_NOCTTY|O_NONBLOCK) = 34
[pid 5269] fstat(34, {st_mode=S_IFCHR|0666, st_rdev=makedev(0x1, 0x9), ...}) = 0
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] close(34) = 0
[pid 5284] <... read resumed> "\1\0\0\0\0\0\0\0", 8) = 8
[pid 5284] read(4, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 5284] read(4, <unfinished ...>
[pid 5269] openat(AT_FDCWD, "/dev/random", O_RDONLY|O_NOCTTY|O_NONBLOCK) = 34
[pid 5269] fstat(34, {st_mode=S_IFCHR|0666, st_rdev=makedev(0x1, 0x8), ...}) = 0
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] close(34) = 0
[pid 5269] openat(AT_FDCWD, "/dev/urandom", O_RDONLY|O_NOCTTY|O_NONBLOCK) = 34
[pid 5269] fstat(34, {st_mode=S_IFCHR|0666, st_rdev=makedev(0x1, 0x9), ...}) = 0
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] ioctl(34, TCGETS, 0x7ffe382b8720) = -1 EINVAL (Invalid argument)
[pid 5269] close(34) = 0
[pid 5284] <... read resumed> "\1\0\0\0\0\0\0\0", 8) = 8
[pid 5284] read(4, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 5284] read(4, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 5284] read(4, ^C <unfinished ...>